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evanh wrote: »
Good question. But neither of those examples requires such simultaneous firings since both examples are a broadly modulated analogue that are far from noise free and far from needing precision on a per sample basis. The response of the motor windings is likely at least a couple of orders of magnitude slower than your carrier frequency. The currents are in phase even if the switching isn't.
The one exception would be if you were to independently drive the high-side and low-side stages with separate outputs on the Prop. And there is an argument for doing that.
A better example is for multichannel direct A/D where noise and phase alignment are critical for each and every sample. Where you want to compare the signal between channels.
The answer is no problem really. That's the power of the Prop, it's deterministic even down to instruction to output response time. About the only unknown is clock jitter/skew.
Sapieha wrote: »
All is relative -->
How much noise You will accept from motors and how bid moving tolerance You will have,
David Betz wrote: »
Is there any chance that Prop II will be available as a PDIP with reduced I/O pins? It's nice to have the option of a PDIP. I hate to see that go away with Prop II.
Bobb Fwed wrote: »
There will be plenty of breakout boards available for DIP people (not meant as an insult).
Bobb Fwed wrote: »
@Beau: If 256K memory isn't going to fit, or it is too much work rearrange things to make it work, is there some constraint on multiples of 128K? Why not try to fit 192K in? That as least is a compromise.
Beau Schwabe (Parallax) wrote: »
No silicon images slated for Prop II yet, but it's easy enough to do with a simple script.
The DsPHYTER I worked on does have an image of a Georgia peach since much of the layout and design was done there